Auger-bit.



No. 809,856. PATENTED JAN. 9,. 1 906.

J. STEIN.

AUGER BIT.

1 APPLICATION FILED 0GT,'7,1905.

UNTTED STATES PATENT OFFIOE.

J AOOB STEIN, OF COAL VALLEY. PENNSYLVANIA, ASSIGNOR OF ONE- THIRD TO LUTHER K. YODER AND ONE-FOURTH TO FRANKLIN A. BAXENDELL, OF PITTSBURG, PENNSYLVANIA.

AUGEFi-BIT.

Specification of Letters Patent.

Patented Jan. 9, 1906.

To all whom, it may concern.-

Be it known that I, J AOOB STEIN. a citizen of the United States of America, residing at Coal Valley, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Auger-Bits, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and usefulimprovements in auger-bits; and the invention relates more particularly to a novel form of bit adapted to be used in connection with angers employed for mining or drilling purposes.

The primary object of this invention is to provide a novel form of reversible bit which can be easily and quickly secured to the end of an anger, the bit being so constructed that its cutting edges can be reversed at any desired time, especially when the cutting edges of one end of the bit have become dull or broken.

Another object of thisinvention is to provide bits having difierent forms of cutting edges, these bits being used for difierent kinds of work, and in connection with these bits a novel form of fastening means is employed for locking the bits in engagement with the end of an anger.

WVith the above and other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts, to be hereinafter more fully described and then specifically pointed out in the claims. 7

Referring to the drawings accompanying this application, like numerals of reference designate corresponding parts throughout the several views, in which Figure 1 is a side elevation of an auger equipped with one of my improved bits. Fig.

2 is a fra mentar pers ective view of the end of an auger constructed in accordance with my invention. Fig. 3 is an edge view of a reversible bit. Fig. 4 is a plan view of the same. Fig. 5 is a cross-sectional view taken on the line m of Fig. 4. Fig. 6 is an edge view of the bit illustrated in connection with Fig. 1 of the drawings. Fig. 7 is a plan of the same. Fig. 8 is an edge view of another form of bit. Fig. 9 is a plan of the same, and

ply reversing the bit upon the auger.

Fig. 10 is a sectional view taken on the line 00 w of Fig. 9.

In the accompanying drawings I have illustrated a conventional form of anger 1, which is generally used by miners or drillers in boring holes for blasting purposes or the like, and my invention resides in providing the end 2 of the auger with a flattened portion 3, which extends outwardly in a plane parallel with the longitudinal axis of the auger. The flattened portion or end 3 of the anger is bifurcated. forminga longitudinally-disposed slot 4. The side arms 5 5 of the bifurcated end are rounded or tapered toward the end of the portion 3, as at 6 6, and the top and bottom edges of these arms bordering upon the slot 4 are beveled, as at 77. The arms 5 5 are provided with alining screw-threaded apertures 6 6, the object of which will be presently described.

In Figs. 3 to 5, inclusive, I have illustrated a reversible bit 8, which I preferably employ in connection with the auger 1, this bit being constructed whereby after one end of it has been used for boring a hole and has become worn or broken the opposite end can be used by sli iln- 1e bit consists of a body portion 9 the ends of which are provided with V-shaped notches 1O 10, forming outwardly-extending tapering points 11, 12, 14, and 15. The point 11 is bent upwardly and beveled upon its inner edge, as at 16, while the point 12 is bent outwardly and beveled upon its underneath inner edge, as at 17. The points 14 15 are similarly constructed, with the exception that the point 15 is bent upwardly, while the point 14 is bent downwardly, thus being the reverse of the points 11 and 12. The body portion 9 of the bit upon its top and bottom faces is provided with longitudinal]y-disposed grooves 18 and 19, and centrally of said bit are formed the vertically-disposed slots 20.

In Figs. 6 and 7 of the drawings I have illustrated a bit having two points 21 22, one of these points being bent upwardly, while the other point is bent downwardly. These points are provided with in wardl y-extcnding beveled cutting edges 23 23. The opposite end of the bit has its body portion 24 provided with longitudinally-disposed grooves 25 25 and with a vertically-disposed slot 26.

Another bit is illustrated in Figs. 8 and 9 of the drawings, this being similarly constructed to the bit illustrated in Figs. 6 and 7 of the drawings, with the exception that the cittiig edges are beveled outwardly, as at 2 2 When either one of the bits illustrated in Figs. 6 to 10, inclusive, are to be used, the bit is placed in engagement with the auger 1 by sliding the body portion of said bits into the slot 4: of the auger, the grooves 25 of said bits being adapted to receive the arms 5 5 of the auger and prevent lateral displacement of the bit when mounted in said auger. A screw 28 is placed in the screw-threaded apertures 6'6, said screw being adapted to pass through the slot 26 of the bit and prevent longitudinal displacement of the same. The points of the bit are preferably constructed within the circumference of the anger or may project slightly beyond the auger, in which instance the auger would simply serve to remove the material being cut and not as a cutting implement itself. The reversible bit 8 is mounted in the auger similar to the other bits, the rearwardly-extending cutting-points protruding into the spiral flute or groove of the auger.

I do not care to confine myself to the type of auger in connection with which my improved bits are used or to the material from which said bits are formed.

What I claim, and desire to secure by Letters Patent, is

1. The combination of an auger consisting of a blade having astraight flat end portion, which end portion is slotted centrally of its Width, and with threaded openings intersecting the slot, of a blade having a longitudinally-disposed groove on each side and atransversely-disposed slot, said blade entering the slot in the auger and the grooves in the blade receiving the side walls of the slot in the auger and a screw extending through the threaded openings in the auger, and through the slot in the bit.

2. The combination with an auger having a flattened end portion, said end portionbeing provided with a longitudinally-disposed'slot forming side arms, and a transverse opening intersecting said slot, of a bit having a -longitudinally-disposed groove on each side and a transverse opening extending from the bottom of one groove to the bottom of the other groove, said bit seating in the slot in the end portion of the auger and said grooves in the bit receiving the side arms of the end portion of the auger and a fastening device passing through the opening in the end portion of the auger and the opening in the bit.

In testimony whereof I afi ix my signature in the presence of two witnesses.

JACOB STEIN. 

